Hi @bertie-müller - I would say they are only "compatible" if your reconfigure your network so that the Instant Router from the AFi-INS System is the primary router of the mesh
So while technically accurate, the chart does not explain in enough detail the requirements
There should be a footnote #3 that states that the router from the system must be the primary router

You cannot add a system kit to an existing mesh network

Consider carefully if you want to do this because the Instant routers do not have some features, like QoS and HW NAT

@bertie-müller I am sorry for the confusion, I will be modifying the compatibility guide to better clarify but @Derek-Saville is correct. They are compatible, however the kit router must be in the primary position.